Improvement in machines for cutting leather for boot and shoe heels



M. H. HALL.

Machines for Cutting Leather for Boot and Shoe Heels.

Patented Dec. 16,1873.

Wineflf UNITED STATES PATENT QFFICE.

MERRITT H. HALL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR CUTTING LEATHER FOR BOOT AND SHOE HEELS.

Specification forming part of Letters Patent No. 145,647, dated December16, 1873 application filed October 6, 1873.

To all whom it may concern:

Be it known that I, MERRITT H. HALL, of

the city and county of Philadelphia and State of Pennsylvania, haveinvented a new and useful Machine for Cutting Leather for Shoe- Heelsand other purposes, of which the following is a specification:

The nature of my invention consists in a combination of a toggle-leverwith a crankshaft, having either a continuous or reciprocating rotarymotion, and cutting-block moved in the cutting operation by thetoggle-lever, and in the intervals between cutting is operated by areciprocating crankshaft, operated by the main crank-shaft, so as towithdraw the cutting-block, and afford the operator at full view andfree access to the cutter or die; and also to so move the blocks as topresent another part of the surface to the action of the cutter at eachsuccessive operation of the machine.

I will now proceed to describe particularly the construction andoperation of my invention, referring in so doing to the drawing annexed,and letters of reference marked thereon.

The same letters apply to the same parts in the several figures.

Figure 1 shows a front elevation, and Fig. 2 a side elevation, of themachine. Both figures are drawn to a scale of one and one-half inch perfoot. Figs. 3 and 4 show modifications of parts. v

A represents the frame of the machine; B and B, a pair of toggle-levers,hung from a shaft, B G, a connecting-rod, conveying motion from thecrank D in the shaft D to the toggle levers. E is a circular block,susceptible of rotation on the boltE by which it is fastened to theunder side of the plate E The plate E may be slotted to permit ofadjustment of the bolt lengthwise. The front end of the plate E isattached to the bottom of the toggle-lever B and the rear end isattached to a crank, G, from which it receives a reciprocating motion.The crank-shaft G receives motion from the, shaft B by means of a crank,B and connecting-rod G bearing a rack, which engages in the teeth of awheel, G on the shaft G In vibrating back and forth, the block E isrotated by a stationary pawl, E fastened to the frame A. The cutter ordie H, placed with its edge upward on the base of the machine, and alever, I, and plunger J, serve to discharge the cut pieces of leatherfrom it. The crank B and the crank D are fixed in such a relativeangular adjust ment to each other that the block E is over the cutter H,and practically stationary when the toggles B and B are extended into astraight line, and when the toggles B and B are drawn up, the block E isdrawn backward out of the way of the operator.

WVhen the machine is propelled by steam or water power, I operate theshaftl) with a continuous rotary movement, employing a clutch topromptly disconnect the shaft from the driving power of the fly-wheel DWhen the ma chine is to be worked entirely by the operator, I fasten thefly-wheel tightly on the shaft, and on the rim of the wheel D fasten aweight, D in such position as to leave the toggles flexed when theweight D is at the lowest point in the wheel. I impart partiallyrotative motion to the shaft D by a chain, K, which is fastened by oneend to a staple, K, in the shaft D, and wraps half-way around the shaft.The other end of the chain is fastened to a treadle, L, which, whendepressed by the foot of the operator, causes the chain K to unwrap fromthe shaft D and rotates it. The momentum of the wheel D and weight 1)causes the shaft to make a complete revolution in the oppositedirection, and wraps the chain K upon it, leaving it ready for the nextimpression. For the rack and pinion, a lever and connecting-rod, or apinion and sector worked by a connecting rod, may be substituted. Thesemodifications are shown in Figs; 3 and 4. Their applications are obviouson inspection of the figures.

What I claim as my invention is-- l. The combination of thereciprocating block E and toggle-levers B and B operated by the cranks Dand B as set forth and de scribed.

2. The reciprocating block E, operated as described, in combination withthe stationary pawl E as set forth.

MERRITT H. HALL.

Witnesses:

J or-nv B. Dnvmn, JAMES P. PETIT.

